* Futures down: Dow 60 pts, S&P 7 pts, Nasdaq 12.5 pts
By Abhiram Nandakumar
Oct 20 (Reuters) - U.S. stock index futures were lower on Tuesday as prices of commodities fell on rekindled worries about demand from China.
* Investors are awaiting a barrage of quarterly results and a speech by Federal Reserve Chair Janet Yellen.
* Third-quarter company earnings are in full focus this week with Verizon, Yahoo and VMware reporting results on Tuesday.
* Investors are pricing in tepid corporate performance for the quarter and watching out for outlook commentary as the effects of global financial turbulence hits American shores.
* S&P 500 companies are expected to show a 3.9 percent fall in third-quarter profit, according to Thomson Reuters data.
* U.S. stocks closed with slight gains on Monday as tech and biotech stocks advanced ahead of a heavy week of earnings.
* Brent crude fell on Tuesday but steadied around $48 a barrel and London copper prices slipped to two-week lows straining under an economic slowdown in China.
* Exxon's shares were down 1.8 percent at $80.99 premarket.
* IBM fell 4.7 percent to $142.15 a day after it reported a bigger-than-expected fall in quarterly revenue and cut its full-year profit forecast.
* Sandisk jumped 8.1 percent to $77.82 after a Reuters report said Western Digital was in advanced talks to buy the memory chipmaker, citing people familiar with the matter.
* Yum Brands rose 4.3 percent to $74.76 after the fast food group said it was preparing to separate its China business.
* Travelers rose 0.6 percent to $107.00 after it reported a rise in third-quarter profit.
* Data on housing starts is scheduled for release on Tuesday at 8:30 a.m. ET (1230 GMT). The data is expected to show 1.15 million units were started in September, up from the 1.13 million units in August.
* Yellen speaks at 11:00 a.m. ET. Fed Board Governor Jerome Powell is also scheduled to speak on Tuesday.
Futures snapshot at 6:43 a.m. ET:
* S&P 500 e-minis were down 7 points, or 0.35 percent, with 84,232 contracts traded.
* Nasdaq 100 e-minis were down 12.5 points, or 0.28 percent, on volume of 13,227 contracts.
* Dow e-minis were down 60 points, or 0.35 percent, with 11,349 contracts changing hands. (Reporting by Abhiram Nandakumar in Bengaluru; Editing by Don Sebastian)